diff --git a/EDK2/edk2_mod/edk2-edk2-stable201911/MdeModulePkg/Application/Ventoy/VentoyProtocol.c b/EDK2/edk2_mod/edk2-edk2-stable201911/MdeModulePkg/Application/Ventoy/VentoyProtocol.c
index 0a24cd9a..9c8fc0e7 100644
--- a/EDK2/edk2_mod/edk2-edk2-stable201911/MdeModulePkg/Application/Ventoy/VentoyProtocol.c
+++ b/EDK2/edk2_mod/edk2-edk2-stable201911/MdeModulePkg/Application/Ventoy/VentoyProtocol.c
@@ -1138,14 +1138,15 @@ EFI_STATUS EFIAPI ventoy_install_blockio(IN EFI_HANDLE ImageHandle, IN UINT64 Im
     {
         gBlockData.Media.BlockSize = 512;
         gBlockData.Media.LastBlock = ImgSize / 512 - 1;
+        gBlockData.Media.ReadOnly = FALSE;
     }
     else
     {
         gBlockData.Media.BlockSize = 2048;
         gBlockData.Media.LastBlock = ImgSize / 2048 - 1;        
+        gBlockData.Media.ReadOnly = TRUE;
     }
     
-    gBlockData.Media.ReadOnly = TRUE;
     gBlockData.Media.MediaPresent = 1;
     gBlockData.Media.LogicalBlocksPerPhysicalBlock = 1;
 
diff --git a/GRUB2/MOD_SRC/grub-2.04/grub-core/ventoy/ventoy_linux.c b/GRUB2/MOD_SRC/grub-2.04/grub-core/ventoy/ventoy_linux.c
index c09b5616..2ff731f1 100644
--- a/GRUB2/MOD_SRC/grub-2.04/grub-core/ventoy/ventoy_linux.c
+++ b/GRUB2/MOD_SRC/grub-2.04/grub-core/ventoy/ventoy_linux.c
@@ -1501,20 +1501,20 @@ grub_err_t ventoy_cmd_linux_chain_data(grub_extcmd_context_t ctxt, int argc, cha
 
     isosize = file->size;
 
-    boot_catlog = ventoy_get_iso_boot_catlog(file);
-    if (boot_catlog)
+    len = (int)grub_strlen(args[0]);
+    if (len >= 4 && 0 == grub_strcasecmp(args[0] + len - 4, ".img"))
     {
-        if (ventoy_is_efi_os() && (!ventoy_has_efi_eltorito(file, boot_catlog)))
-        {
-            grub_env_set("LoadIsoEfiDriver", "on");
-        }
+        debug("boot catlog %u for img file\n", boot_catlog);
     }
     else
     {
-        len = (int)grub_strlen(args[0]);
-        if (len >= 4 && 0 == grub_strcasecmp(args[0] + len - 4, ".img"))
+        boot_catlog = ventoy_get_iso_boot_catlog(file);
+        if (boot_catlog)
         {
-            debug("boot catlog %u for img file\n", boot_catlog);
+            if (ventoy_is_efi_os() && (!ventoy_has_efi_eltorito(file, boot_catlog)))
+            {
+                grub_env_set("LoadIsoEfiDriver", "on");
+            }
         }
         else
         {
diff --git a/GRUB2/MOD_SRC/grub-2.04/install.sh b/GRUB2/MOD_SRC/grub-2.04/install.sh
index 59d7d0ba..5b7175b4 100644
--- a/GRUB2/MOD_SRC/grub-2.04/install.sh
+++ b/GRUB2/MOD_SRC/grub-2.04/install.sh
@@ -97,6 +97,8 @@ elif [ "$1" = "arm64" ]; then
         if ! echo $all_modules | grep -q " ${line%.mod} "; then
             echo "Copy $line ..."
             cp -a $VT_DIR/GRUB2/INSTALL/lib/grub/arm64-efi/$line    $VT_DIR/INSTALL/grub/arm64-efi/
+            xz $VT_DIR/INSTALL/grub/arm64-efi/$line
+            mv $VT_DIR/INSTALL/grub/arm64-efi/${line}.xz $VT_DIR/INSTALL/grub/arm64-efi/${line}
         fi
     done
 elif [ "$1" = "mips64el" ]; then
diff --git a/INSTALL/grub/grub.cfg b/INSTALL/grub/grub.cfg
index dc3f6464..66537063 100644
--- a/INSTALL/grub/grub.cfg
+++ b/INSTALL/grub/grub.cfg
@@ -1758,6 +1758,7 @@ function legacy_img_memdisk {
 function img_common_menuentry {
     set ventoy_compatible=YES
     set ventoy_busybox_ver=32
+    unset LoadIsoEfiDriver
 
     vt_chosen_img_path vt_chosen_path vt_chosen_size
     
diff --git a/INSTALL/tool/ventoy_lib.sh b/INSTALL/tool/ventoy_lib.sh
index a394eb14..709ce2c0 100644
--- a/INSTALL/tool/ventoy_lib.sh
+++ b/INSTALL/tool/ventoy_lib.sh
@@ -320,7 +320,7 @@ EOF
     for i in 0 1 2 3 4 5 6 7 8 9; do
         check_umount_disk "$PART2"
 
-        if mkfs.vfat -F 16 -n VTOYEFI $PART2; then
+        if mkfs.vfat -F 16 -n VTOYEFI -s 1 $PART2; then
             echo 'success'
             break
         else
diff --git a/INSTALL/ventoy_pack.sh b/INSTALL/ventoy_pack.sh
index d6eedbaf..8d47fe74 100644
--- a/INSTALL/ventoy_pack.sh
+++ b/INSTALL/ventoy_pack.sh
@@ -77,9 +77,13 @@ cp $OPT ./tool/ENROLL_THIS_KEY_IN_MOKMANAGER.cer $tmpmnt/
 
 
 mkdir -p $tmpmnt/tool
-cp $OPT ./tool/i386/mount.exfat-fuse     $tmpmnt/tool/mount.exfat-fuse_i386
-cp $OPT ./tool/x86_64/mount.exfat-fuse   $tmpmnt/tool/mount.exfat-fuse_x86_64
-cp $OPT ./tool/aarch64/mount.exfat-fuse  $tmpmnt/tool/mount.exfat-fuse_aarch64
+# cp $OPT ./tool/i386/mount.exfat-fuse     $tmpmnt/tool/mount.exfat-fuse_i386
+# cp $OPT ./tool/x86_64/mount.exfat-fuse   $tmpmnt/tool/mount.exfat-fuse_x86_64
+# cp $OPT ./tool/aarch64/mount.exfat-fuse  $tmpmnt/tool/mount.exfat-fuse_aarch64
+# to save space
+cp $OPT ./tool/i386/vtoygpt     $tmpmnt/tool/mount.exfat-fuse_i386
+cp $OPT ./tool/x86_64/vtoygpt   $tmpmnt/tool/mount.exfat-fuse_x86_64
+cp $OPT ./tool/aarch64/vtoygpt  $tmpmnt/tool/mount.exfat-fuse_aarch64
 
 
 rm -f $tmpmnt/grub/i386-pc/*.img